Introduction: Extracranial aneurysm of the internal carotid artery is an exceptional finding.
Case report: An 89-year-old woman consulted for a peritonsillar mass. Physical examination revealed a parapharyngeal pulsatile mass in the oropharynx. Computed tomography (CT) provided the diagnosis of extracranial internal carotid artery aneurysm. Endovascular or surgical treatment were declined. Anticoagulation medication was given.
Discussion: We reviewed the CT and magnetic resonance imaging findings and the clinical manifestations of extracranial internal artery aneurysm. Endovascular treatment is an alternative to open surgery.